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wlr_scene: Add a function to also specify damage when applying a buffer to wlr_scene_buffer

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This commit is contained in:
Alexander Orzechowski 2022-05-18 22:37:05 -04:00
parent 34be5da072
commit 73a656e8ac
2 changed files with 91 additions and 15 deletions
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9
include/wlr/types/wlr_scene.h
View file

@ -303,6 +303,15 @@ struct wlr_scene_buffer *wlr_scene_buffer_create(struct wlr_scene_node *parent,
void wlr_scene_buffer_set_buffer(struct wlr_scene_buffer *scene_buffer,
struct wlr_buffer *buffer);
/**
* Sets the buffer's backing buffer with a custom damage region.
*
* The damage region is in buffer-local coordinates. If the region is NULL,
* the whole buffer node will be damaged.
*/
void wlr_scene_buffer_set_buffer_with_damage(struct wlr_scene_buffer *scene_buffer,
struct wlr_buffer *buffer, pixman_region32_t *region);
/**
* Set the source rectangle describing the region of the buffer which will be
* sampled to render this node. This allows cropping the buffer.

97
types/scene/wlr_scene.c
View file

@ -420,27 +420,94 @@ struct wlr_scene_buffer *wlr_scene_buffer_create(struct wlr_scene_node *parent,
return scene_buffer;
}
void wlr_scene_buffer_set_buffer(struct wlr_scene_buffer *scene_buffer,
struct wlr_buffer *buffer) {
if (buffer == scene_buffer->buffer) {
void wlr_scene_buffer_set_buffer_with_damage(struct wlr_scene_buffer *scene_buffer,
struct wlr_buffer *buffer, pixman_region32_t *damage) {
// specifying a region for a NULL buffer doesn't make sense. We need to know
// about the buffer to scale the buffer local coordinates down to scene
// coordinates.
assert(buffer || !damage);
if (buffer != scene_buffer->buffer) {
if (!damage) {
scene_node_damage_whole(&scene_buffer->node);
}
wlr_texture_destroy(scene_buffer->texture);
scene_buffer->texture = NULL;
wlr_buffer_unlock(scene_buffer->buffer);
if (buffer) {
scene_buffer->buffer = wlr_buffer_lock(buffer);
} else {
scene_buffer->buffer = NULL;
}
scene_node_update_outputs(&scene_buffer->node);
if (!damage) {
scene_node_damage_whole(&scene_buffer->node);
}
}
if (!damage) {
return;
}
scene_node_damage_whole(&scene_buffer->node);
wlr_texture_destroy(scene_buffer->texture);
scene_buffer->texture = NULL;
wlr_buffer_unlock(scene_buffer->buffer);
if (buffer) {
scene_buffer->buffer = wlr_buffer_lock(buffer);
} else {
scene_buffer->buffer = NULL;
int lx, ly;
if (!wlr_scene_node_coords(&scene_buffer->node, &lx, &ly)) {
return;
}
scene_node_damage_whole(&scene_buffer->node);
struct wlr_fbox box = scene_buffer->src_box;
if (wlr_fbox_empty(&box)) {
box.x = 0;
box.y = 0;
scene_node_update_outputs(&scene_buffer->node);
if (scene_buffer->transform & WL_OUTPUT_TRANSFORM_90) {
box.width = buffer->height;
box.height = buffer->width;
} else {
box.width = buffer->width;
box.height = buffer->height;
}
}
double scale_x, scale_y;
if (scene_buffer->dst_width || scene_buffer->dst_height) {
scale_x = scene_buffer->dst_width / box.width;
scale_y = scene_buffer->dst_height / box.height;
} else {
scale_x = buffer->width / box.width;
scale_y = buffer->height / box.height;
}
pixman_region32_t trans_damage;
pixman_region32_init(&trans_damage);
wlr_region_transform(&trans_damage, damage,
scene_buffer->transform, buffer->width, buffer->height);
pixman_region32_intersect_rect(&trans_damage, &trans_damage,
box.x, box.y, box.width, box.height);
struct wlr_scene *scene = scene_node_get_root(&scene_buffer->node);
struct wlr_scene_output *scene_output;
wl_list_for_each(scene_output, &scene->outputs, link) {
float output_scale = scene_output->output->scale;
pixman_region32_t output_damage;
pixman_region32_init(&output_damage);
wlr_region_scale_xy(&output_damage, &trans_damage,
output_scale * scale_x, output_scale * scale_y);
pixman_region32_translate(&output_damage,
(lx - scene_output->x) * output_scale, (ly - scene_output->y) * output_scale);
wlr_output_damage_add(scene_output->damage, &output_damage);
pixman_region32_fini(&output_damage);
}
pixman_region32_fini(&trans_damage);
}
void wlr_scene_buffer_set_buffer(struct wlr_scene_buffer *scene_buffer,
struct wlr_buffer *buffer) {
wlr_scene_buffer_set_buffer_with_damage(scene_buffer, buffer, NULL);
}
void wlr_scene_buffer_set_source_box(struct wlr_scene_buffer *scene_buffer,